He made his announcement in an email to CBP employees, which was obtained by ABC News. His departure follows allegations made by independent inspectors who claimed migrant children were being kept at border stations with deplorable conditions, including a facility that one doctor compared to “torture facilities.”

CBP officials, speaking on condition of anonymity, on Tuesday, denied allegations of mistreatment at Border Patrol facilities, but said an internal investigation was underway. Two other administration officials said Sanders’ resignation was not tied to the recent allegations of neglect at one facility in Clint, Texas.

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